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Characteristics of Top Tier gasoline. In order to be certified as Top Tier, a gasoline must pass a series of performance tests that demonstrate specified levels of: 1) deposit control on intake valves; 2) deposit control on fuel injectors; 3) deposit control on combustion chambers; 4) prevention of intake-valve sticking. [4]
N,N'-Di-2-butyl-1,4-phenylenediamine. Ethylenediamine. Detergents; see also Top Tier Detergent Gasoline. Amines aka "nitrogen enriched". Polybuteneamine (PBA) Polyetheramine (PEA); see also Techron. Polyisobutyleneamine (PIBA) Antiknock agents. Tetraethyllead (TEL), now banned almost everywhere for causing brain damage.
Fuel brands Sunoco Performance Fuels Sunoco fuel pump with five octane ratings. As of 2017, Sunoco's full lineup of fuels meets both the demands of high-performance drivers and the specifications of the TOP TIER Fuel Program. Its enhanced fuel detergency helps keep engines clean and ensures compliance with tight vehicle emissions requirements.
These brands’ products can potentially compromise engine performance and fuel efficiency, making them less than ideal for motorists seeking reliable gasoline. Circle K. While once a Top Tier ...
Costco (Kirkland brand gasoline) Crown. Cumberland Farms. Delta Fuel Stations – Independently Branded Gas Stations. Delta Sonic – Western New York. EddieWorld. Exxon. Etna. Family Express – Indiana.
What's more, Costco only sells Top Tier gasoline, the gold standard when it comes to fuel. In other words, Costco gas is a high-quality, cheap staple — a clear must-buy product.
Carrefour — France, Belgium, Spain, Italy, Poland and Romania. Casino — France. Cepsa — Spain, Andorra, Morocco and Portugal. Certified — independent brand based in Columbus, Ohio, United States, selling fuel under the Certified brand; also sells fuel at select stations under the Marathon and Sunoco brands. Cango.
Most states do not mandate certain standard gasoline grade octane ratings. In the United States and Canada, octane ratings are in AKI, commonly shown as "(R+M)/2". All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance.